[填空题]
One means of enriching u,ifey+xa1nalx npd/ 9a g(i (0ranium is by d d;g ,ovj5d:veiffusion of the gas $\text{UF}_6$. Calculate the ratio of the speeds of molecules of this gas containing $_{92}^{235}\text{U}$ and $_{92}^{238}\text{U}$ on which this process depends. :1